add missing parameter doc

diff --git a/tornado/httpclient.py b/tornado/httpclient.py
index bfdc71363d1268f52b5ac7b84db6c5b0563029d4..63d8c2a1ba219373a9e31208d6a95dc845b66a8a 100644 (file)
--- a/tornado/httpclient.py
+++ b/tornado/httpclient.py
@@ -258,6 +258,7 @@ class HTTPRequest(object):
         :arg string url: URL to fetch
         :arg string method: HTTP method, e.g. "GET" or "POST"
         :arg headers: Additional HTTP headers to pass on the request
+        :arg body: HTTP body to pass on the request
         :type headers: `~tornado.httputil.HTTPHeaders` or `dict`
         :arg string auth_username: Username for HTTP "Basic" authentication
         :arg string auth_password: Password for HTTP "Basic" authentication